CN113101740A - Mud drilling fluid negative pressure shale shaker - Google Patents
Mud drilling fluid negative pressure shale shaker Download PDFInfo
- Publication number
- CN113101740A CN113101740A CN202110398571.5A CN202110398571A CN113101740A CN 113101740 A CN113101740 A CN 113101740A CN 202110398571 A CN202110398571 A CN 202110398571A CN 113101740 A CN113101740 A CN 113101740A
- Authority
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- China
- Prior art keywords
- negative pressure
- screen
- drilling fluid
- box body
- pressure cavity
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
- B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
- B01D33/0346—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements
- B01D33/0353—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
- B01D33/74—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging filtrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
Abstract
The invention is designed aiming at the problems that the prior drilling fluid vibrating screen still contains more drilling fluid after being treated, and is easy to cause environmental pollution and the like in the field of petroleum drilling screening. The technical scheme is as follows: and a negative pressure device is arranged under the vibrating screen to realize the efficient separation of the drilling fluid and the rock debris. The negative pressure device mainly comprises a V-shaped negative pressure cavity box body, a pump, a filter screen, a U-shaped pipe, a sensor and the like. The fine mesh screen is arranged right above the negative pressure cavity, the screen holes of the fine mesh screen and the mud continuously covered on the screen are very small, the small holes on the screen can be covered by the tension force of the liquid surface, and in addition, the drilling fluid flowing through the screen right below the negative pressure cavity forms an equal pressure surface at the two ends of the U-shaped pipe, so that the negative pressure is formed in the box body of the V-shaped negative pressure cavity under the working action of the pump, and the solid-liquid separation efficiency of the vibrating screen is improved. The sensor is used for detecting whether the drilling fluid in the V-shaped negative pressure cavity box body normally flows out from the outlet or not, so that the problem of drilling fluid overflow caused by blockage is prevented, and the normal work of the instrument is ensured.
Description
Technical Field
The invention relates to a mud drilling fluid negative pressure vibrating screen, which is used for the technical field of petroleum drilling equipment.
Background
In the shale gas well rapid drilling engineering, the drilling fluid vibrating screen is the first-stage solid control equipment of a drilling mud purification system, and not only needs to undertake the task of removing a large amount of large-particle rock debris, but also needs to create necessary conditions for the normal work of the next-stage solid control equipment. The drilling fluid vibrating screen is mainly used for removing rock debris and other harmful solid-phase particles in the drilling fluid, and on one hand, the drilling fluid vibrating screen requires larger processing capacity and can recover the drilling fluid with higher cost as much as possible; on the other hand, solid-phase particles in the drilling fluid are required to be removed as much as possible, the underground safety is guaranteed, the drilling speed is increased, and the drilling period is shortened. In order to effectively overcome the problems that the drilling fluid vibrating screen is frequently accompanied with screen paste and slurry leakage in the petroleum drilling engineering, the translational elliptical vibrating screen combining the advantages of a circular vibrating screen and a linear vibrating screen is provided. In recent years, with the continuous development of the drilling construction technology level, the requirements on the drilling vibrating screen are higher and higher. Due to the severe environment and narrow space of the drilling operation site, the screening efficiency and the processing capacity of the drilling vibrating screen need to be further improved. The existing drilling mud recycling equipment mostly adopts an open type or semi-open type mode for screening, the inertia force and the potential energy of the drilling fluid are brought to the drilling fluid by screen vibration in dialysis, and the mud still contains a large amount of drilling fluid after being treated by a drilling fluid vibrating screen, so that raw materials are wasted, the environment is polluted, and the treatment efficiency is low. In order to solve the problems, the mud drilling fluid negative pressure vibrating screen is particularly provided, and the screening efficiency and the processing capacity of the mud drilling fluid vibrating screen can be effectively improved.
Disclosure of Invention
The invention adopts the following technical scheme:
a mud drilling fluid negative pressure vibrating screen mainly comprises an excitation motor, a vibrating screen base, a vibrating screen box body, a screen, a motor base, a V-shaped negative pressure cavity box body, a pump, a U-shaped pipe, a sensor, a spring and the like. The vibration excitation motor is fixed on the vibrating screen box body through the motor base, and the vibrating screen box body is connected with the base through four supporting springs. The fine mesh screen and the V-shaped negative pressure cavity box body are arranged at the bottom of the inner side of the vibrating screen box body, wherein the V-shaped negative pressure cavity box body is connected under the vibrating screen box body through a bolt and sealed by a sealing strip. In addition, one side of the V-shaped negative pressure cavity box body is connected with a vacuum pump through a hose, the lower part of the V-shaped negative pressure cavity box body is connected with the inlet end of the U-shaped pipe through a valve, and the outlet end of the U-shaped pipe is provided with a filter screen. V type negative pressure chamber box side passes through the hose and is connected with the evacuation pump to a baffle is welded to the top at the entrance, and this baffle can prevent that the drilling fluid that the top dropped from getting into the evacuation pump, and at the hollow little square of this hole below welding simultaneously, this square bottom surface can be dismantled and open there is the aperture, and the sensor is placed to the square inside, and the sensor sends out the instruction and stops equipment operation and send the warning when the aperture is crossed in the liquid level submergence. When the system works, drilling fluid flows into the fine screen mesh through rock debris carried by the circulating system, and solid and liquid of the vibrating screen begin to be separated under the action of the vibration characteristic of the vibrating screen. Due to the action of the fine mesh screen and the vibration characteristic, a small part of small-particle rock debris and a large part of drilling fluid in the drilling fluid carrying the rock debris flow into the V-shaped negative pressure cavity box body through the screen, so that the small-particle rock debris and the large part of drilling fluid flow into the U-shaped pipe, and the large part of solid-phase particles continue to advance until the solid-phase particles are discharged from the outlet of the screen. At the outlet of the U-shaped pipe, the residual small particles in the screened slurry can be prevented from flowing out from the outlet due to the action of the filter screen, and the secondary purification effect is achieved. When the negative pressure pump works, the U-shaped pipe is communicated with the outside air, negative pressure cannot be formed, the drilling fluid flowing through the screen forms an equal-pressure surface at the two ends of the U-shaped pipe, and air cannot be sucked back into the U-shaped pipe. And because the sieve pores of the mud and fine sieve meshes continuously covered on the screen of the drilling fluid vibrating screen are very small, the small pores on the screen can be covered by the surface tension of the liquid, and negative pressure can be conveniently formed under the screen at the moment. When the sensor in the V-shaped negative pressure cavity box is submerged and the mud blockage is detected, the machine stops working and gives an alarm, at the moment, the U-shaped pipe needs to be detached, and solid-phase particles in the U-shaped pipe are cleaned. And the circulation is performed in sequence, and the negative pressure vibrating screen realizes the recovery of the drilling fluid to the maximum extent under the action of the vibration characteristic and the negative pressure.
The invention has the advantages that: (1) by forming negative pressure under the screen mesh, drilling fluid and particles can be effectively separated, and the processing capacity and the separation efficiency of the vibrating screen are improved. (2) The condition of a system can be better detected by designing a U-shaped pipe device and a sensor detection structure at the bottom of the screen, so that the vibrating screen realizes negative pressure in a working state. (3) Reasonable structure, easy installation, low noise and low cost.
Drawings
FIG. 1 is a three-dimensional view of a mud drilling fluid negative pressure shaker of the present invention.
FIG. 2 is a cross-sectional view of a V-shaped negative pressure cavity box of the mud drilling fluid negative pressure shaker of the present invention.
In the figure: 1. the vibration screen comprises a spring, 2, a first vibration motor, 3, a second vibration motor, 4, a motor base, 5, a vibration screen box body, 6, a screen, 7, a hose, 8, a V-shaped negative pressure cavity box body, 9, a pump, 10, a U-shaped pipe, 11, a vibration screen base, 12, a filter screen, 13, a baffle, 14, a hose connector and 15, and a sensor.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the mud drilling fluid negative pressure vibrating screen mainly comprises a spring (1), a first excitation motor (2), a second excitation motor (3), a motor base (4), a vibrating screen box body (5), a screen (6), a hose (7), a V-shaped negative pressure cavity box (8), a pump (9), a U-shaped pipe (10), a vibrating screen base (11), a filter screen (12), a baffle (13), a hose connecting port (14), a sensor (15) and the like. The vibration excitation motor I (2) and the vibration excitation motor II (3) are arranged on the vibrating screen box body (5) through the motor base (4); a fine screen (5) and a V-shaped negative pressure cavity box (7) are arranged in the vibrating screen box body (5), wherein the V-shaped negative pressure cavity box (7) is connected to the right lower part of the vibrating screen box body (5) through sealing; a hole is formed in the side surface of the V-shaped negative pressure cavity box body (7) and a hose connecting port (14) is welded, and the hose (7) is connected between the hose connecting port (14) and the pump (9); a baffle plate (13) is welded above the hose connecting port (14) to prevent drilling fluid flowing downwards from the upper part from being sucked into the hose (14); a small hollow cube is welded at a connecting port (14) on the side wall of the V-shaped negative pressure cavity box body (8), the bottom surface of the cube is detachable and provided with a small hole, a sensor (15) is arranged in the cube, and when the liquid level is immersed in the small hole, the sensor (15) sends an instruction to stop the equipment and send an alarm; a hole is formed below the V-shaped negative pressure cavity box body (8), the U-shaped pipe (10) is connected through a bolt, and a rubber ring is arranged at the joint for sealing; a filter screen (12) is arranged at the outlet of the U-shaped pipe, so that the secondary filtering effect can be achieved, and a large amount of small-particle slurry is prevented from being brought out by the slurry; the vibrating box body (5) is connected with the vibrating screen base (11) through four supporting springs (1).
Claims (2)
1. The mud drilling fluid negative pressure shale shaker is mainly composed of an excitation motor, a shale shaker base, a shale shaker box body, a screen, a motor base, a V-shaped negative pressure cavity box body, a pump, a U-shaped pipe, a sensor, a spring and the like, and is characterized in that a negative pressure device is composed of the V-shaped negative pressure cavity box body, the pump, the filter screen, the U-shaped pipe and the like, isolation between the bottom of a negative pressure cavity of the shale shaker and outside air can be achieved under the action of the U-shaped pipe, a fine screen is arranged right above the negative pressure cavity, when the shale shaker starts to work, drilling fluid gradually covers the screen, due to small holes in the screen, small holes in the screen can be covered by adding liquid surface tension, the negative pressure pump is opened at the moment, and.
2. The mud drilling fluid negative pressure shale shaker of claim (1), further characterized in that, the liquid sensor of negative pressure intracavity portion installation can detect the condition of the inside drilling fluid of negative pressure chamber: when the liquid level is immersed in the small hole, the sensor sends a signal instruction to stop the vibrating screen and send an alarm, and at the moment, the U-shaped pipe is blocked and needs to be detached for cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398571.5A CN113101740A (en) | 2021-04-12 | 2021-04-12 | Mud drilling fluid negative pressure shale shaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398571.5A CN113101740A (en) | 2021-04-12 | 2021-04-12 | Mud drilling fluid negative pressure shale shaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113101740A true CN113101740A (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110398571.5A Pending CN113101740A (en) | 2021-04-12 | 2021-04-12 | Mud drilling fluid negative pressure shale shaker |
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| CN (1) | CN113101740A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113318500A (en) * | 2021-08-02 | 2021-08-31 | 四川宝石机械专用车有限公司 | Pulsation drilling fluid vibrating screen |
| CN113669024A (en) * | 2021-10-22 | 2021-11-19 | 西南石油大学 | Independent double-negative-pressure well drilling vibrating screen |
| CN113769467A (en) * | 2021-10-13 | 2021-12-10 | 哈尔滨工程大学 | Drilling pulse air pressure vibrating screen |
| CN115234184A (en) * | 2022-06-23 | 2022-10-25 | 西南石油大学 | Automatic flowing back and vacuum chuck integrated negative pressure well drilling shale shaker |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113318500A (en) * | 2021-08-02 | 2021-08-31 | 四川宝石机械专用车有限公司 | Pulsation drilling fluid vibrating screen |
| CN113769467A (en) * | 2021-10-13 | 2021-12-10 | 哈尔滨工程大学 | Drilling pulse air pressure vibrating screen |
| CN113669024A (en) * | 2021-10-22 | 2021-11-19 | 西南石油大学 | Independent double-negative-pressure well drilling vibrating screen |
| CN115234184A (en) * | 2022-06-23 | 2022-10-25 | 西南石油大学 | Automatic flowing back and vacuum chuck integrated negative pressure well drilling shale shaker |
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Application publication date: 20210713 |